Step-by-step combination door locking mechanism



Jan. 2, 1951 J. J. DURY STEP-BY-STEP COMBINATION DOOR LOCKING MECHANISM Filed Jan. l0, 1948 2 Sheets-Sheet l fmrmgs ATTORN Jan. 2, 1951 J. J. DURY sTEP-BY-SIEP COMBINATION DooR LOCKING MECHANISM 2 Sheets-Sheet 2 Filed Jan. 10, 1948 Tf1-E Ila-2' Patented Jan. 2, 1951 STEP-BY-STEP COMBINATION DOOR LOCKING MECI-IANISM John J. Dury, Montreal, Quebec, Canada Application January 10, 1948, Serial No. 1,630 In Canada January 17, 1947 4 Claims.

This invention relates to burglar baiiling door` i locks and has for its principal object the provision of an efficient, economical, and thoroughly practical door locking and releasing mechanism of the pushbuttoncontrolled combination type which cannot be operated to unlock the door from i the outside except by actuating certain of the controlling pushbuttons in a predetermined sequence. A further object is to provide, in a door locking yand releasing mechanism oi the type reierred to, novel arrangements whereby the door may be unlocked from the inside independently ci the pushbuttons.

A salient feature of the invention consists in the provision of a door locking and releasing mechanism comprising a movable door locking bolt, `a pair of vertically movable slides including a bolt controlling slide and a pawl releasing slide, a retaining pawl for supporting the bolt controlling slide indiierent elevated positions to which said slide is successively raised, a series of pushbuttons, 4and slide actuating elements connected to said pushbuttons and cooperating with portions of said slides to (a) effect a step-by-step raising o1" the bolt controlling slide to a bolt releasing or retracting position in response to successive operation of certain of said pushbuttons in a predetermined sequence; or (b) raise the pawl releasing slide against said pawl and thereby Withdraw the pawl from supporting engagement with the bolt controlling slide in response to operation of the pushbuttons in other than said predetermined sequence.

Another feature of the invention consists in the provision of novel arrangements whereby either an adult or a small child may operate the bolt controlling slide to a bolt releasing or retracting position to unlock the door from the inside or outside without disturbing the initial setting of the pushbuttons and the pawl releasing slide.

Other objects, advantages and characteristic features of the invention will be set forth or made apparent in the following detailed description of the accompanying drawings, in which- Fig. l is a side elevational view of a portion of a door and door jamb to which component parts of my improved door locking mechanism `are applied.

Fig. 2 is a view similar to Fig. l but with the door handle and a cover plate of the door locking Fig. 4 is a sectional view taken substantially along the section line 4-4 of Fig. 2.

Fig. 5 is a sectional view taken substantially along the line 55 of Fig. 2.

Figs. 6 to 9 inclusive are diagrammatic views showing the manner in which the bolt controlling slide is raised to a bolt releasing or retracting position by the pushbuttons when the latter are operated successively in the correct sequence.

Fig. 10 is a diagrammatic view showing the manner in which the pawl, which supports the bolt controlling slide in its different positions of elevation, is released from supporting engagement with said slide by an upward pawl releasing movement of the pawl releasing slide when the pushbuttons are operated in other than the correct predetermined sequence.

Fig. ll is a view similar to Fig. 4 but showing the parts in a different position.

In these drawings, 5 and designate, respec tively, a door and a door jamb to which component parts of my improved combination door lock are applied.

The part of the lock carried by door jamb 5 comprises a vertically disposed bolt-engaging pin 'l rigidly mounted in a corner recess t by means of vertically spaced supporting brackets 9.

The remaining parts of the lock carried by door 5 include a pivotally mounted jaw-type bolt H! and bolt locking and releasing mechanisms generally indicated at H.

Bolt I0 operates in recess i2 of door 5 and is mounted to swing about vertical pivot i3 carried by angle plate i4 countersunk in said recess. Plate I4 is provided with a slot i5 accommodat ing bolt Ill and the ends of pivot i3 are fitted in openings provided in portions of the plate located above and below said slot. Bolt iii is formed with two integral jaws i6 adapted to be disposed in embracing engagement with the boltengaging pin 1 of door jamb 6 as shown in Figs. 2 and 3. Bolt I0 is also provided with. a tail extension I1 affording a, locking shoulder I8 adapted to be eng-aged by a locking pin I9 to thereby lock the bolt in the position shown in Fig. 3 and prevent opening of the door 5.

Locking pin lil works in guide bore im provided in plate it. Bore 20 extends downwardly from the upper edge of plate i4 and intersects a narrow portion lfa of slot I5 through which the tail extension l1 of bolt i5 travels when said bolt is free to swing in the door releasing direction indicated by arrow 2l in Fig. 3. y

Door 5 is an inwardly opening door which is locked in closed position when jaws I6 of bolt'l' ing upwardly through an opening 2:@ previded in Y the upper hollow end portion 25m, oi a handle member 25 rigidly secured to the-inner side ci* door 5. rihe lower end of pushbutton 23 bears against one end of a lever 2S intermediately pivoted at Zi. The other end of lever extends into a vertical elongated slot 23 provided in" an upper part of locking pin ie which prciects above When pushbutton' 23 is depressed it operates Alever v26 to raise the lower end of locking pin I3 labove the tail extension il of bolt le. rnis per- The third arrangement for unlocking the doorv is operable from the outside and is of the pushbutton-controlled combination type which functions only when certain of the controlling pushbuttons are operated in a predetermined sequence. The principal components of this third arrangement ,include allock" releasing lever. 35 which operates lockingvpinllg, a 'lock-releasing slide 33 which operates lever 35, a retaining pawl 31 which cooperates with teeth 38 on slide 36 to V hold said slide in different elevated positions to whichyit' is progressively shifted in a lock releas- Y"nits' bolt Ie to swingin the door releasing direc- 3? tic'n`indieated by'arrow 2i when door il is swung inwardly -bypulling YonA the handle member 25. Duringfthe' inward movement of the door` the pressure of pin TI against the outer jaw iii oi bolt I9 causes the bolt to swing about the pivot i3 so; l

thatj'aws: 'it are withdrawn from engagement with 'bolt-engaging pin i by a combined sliding "and" angular vmovement ci" the jaws relative to Y rvsaid @1A second arrangement for unlocking door 511 from the inside comprises a pusher pin 25 working in that portionoibor'e-Z which extends below bolt Il). The upper end of pin 23 is engaged by the lower end of locking pin le when the latter "is'in the-bolt locking position shown in Fig. 115;'.

'lhe lower end of pin 29 is engaged and supported by an operating cam 33 rotatably mounted in a bore 3| intersecting the lower endof bore 2e. Cam l3ii is shown as a generally cylindrical memfberf which is recessed as indicated at SIa to pro-1.

revolution fromV the position shown in Fig. 4' the 'cani lift portion 32 raises pusher pin 2S and locking pin I9 to the position shown in Fig. l1.' Inf this position oflocking pin I9 theV bevelled sur- Yface 33a of the locking pin is disposed opposite Y theshoulder I8 of the locking bolt. This permits V'door 5 to'be readily opened by pulling inwardly Fon handle member 25 orA by pushing from outsidev since surface 330, of locking pin I9 provides an "v inclined plane against which shoulder i8 acts 5 to force the'locking pin upwardly against spring ff48 to a`bolt releasing positionwhen' torque is applied to thev locking bolt l ii` by the pressure which pin-'1 exerts against the outer Yjaw I3 in response to fthe `inward pull on handle 25.' This second arrangement for unlocking the door from Vthefinside is'forthe convenience of children unable to 2 reach and operate the push pin 23-at the top-V of handle 25.

- a tooth `.5S-which bears against the toothed poring direction, a resetting or pawl releasing slide Sii-which cooperates with pawl 31 to reset the locking releasing slide 3e when the control pushbuttons are operated in incorrect sequence, a plurality of slide actuating elements 4t, and a pluraiitypfcontrol pushbuttons 4I to which the elements 4B are operatively connected.

One endl of'lslide releasing lever -35 extends through guideway 44 (Fig. 2) of plate I4 intol's-lot R35 provided in the intermediate portion of locking pin I9. The other endo'f lever 35 is pivoted, at 46, to a supporting bracketAI'If;v LeverfjBE-.is urged downwardly by'a biasing spring 48 having its upper end secured' to the lever: and its lower end fastened to ananchorin'g pin 49. Lock releasing slide 35 is `recessed at 5I toaccommodate lever 35-"andto provide a :lever operating-shoulder 52. vWhen. slide 35 is shifteduto th'eupp'er limit of its vtravel, as vhereinaiterfdescribed, the shoulder 52 operates Alever `35 against the resistancefof spring 48-to: lift lockingnpin I9 to a'bolt releasing position above the tail extension Il'of'bolt IIL i. 1 The slides 3BV and 3.9.. are 'guided "by suitable brackets 54 and 55 andare'arangedl iniabutting edge to edge relationso that their correspond-ing fsidesuraces 'are co-plana'r as showniin'f Figi-,3.

The pawl 3I.is` shown asa vertically disposed 'substantially triangularl member having Ione lowerV corner portion-fastened to'fbrack'et:ebyfpivot 5? so that the 'reinaining-zlowerA lcorner-portion bearsy against the upperfendofjslide 39...; The-upper corner'portion of -pawl3l isf-shaped?.tofpr'ovide tion of 'slidef36. r. a. an' .y

Y' The .abutting edges ofs1i` es 36` nd; Haare notched to'provide notchesfNl', N2', NNirifNf, and N6 in 'slide 39 and similar notches N", N8, N9 and N10. in slide 36:15. f 1

nach of the slide actuan-ng' mme eis-provided, at'one end, witha laterallyeXtending .slide actuating projectionz which normallyrlies with- :in one of the 'previouslyementionedznotchesiof slide 39;.: The otherend of.' .feach' element 54,0 is

formed rinto Aa fork whicliis fastened'by pivotzl,

-toftheinnerfendflof the stem portion 62 of one of the pushbuttons 4I.

The pushbuttons 4I and their stein portioiisZ areV slidablyl mounted inguide ,openings 53 lpro- -vided ina guide wecken-,1:0 which the Slides-.uid-

The; lockingfpin operating.-levei 36 and 3S, the pawl 37, the slide actuatmgelein door"lo.cking :engagement-with Abolt-enga 'ng g `this position of, the parts thedooiycambeunlocked fsaidpa'wl out vof supporting engagement with y' sv dslide. said last-,mentioned means comprising ""a'nsecond pawl-releasing slidewhich is actuated to a paWl-releasing Vposition "by ithe slidel actuating :'member "connected tothe rushbutton whicn-'is erated *out of proper sequence. y

22 'iIn-a door locking mechanism;I a vertically movablebolt controllinglslide adaptedl tof'be vvraised in a'step-bystep manner from astarting 'fpoSif/ibn to an elevated bolt'eleasing or -(retraetfing position, a'slide retaining membernormally arranged'to engage and support `the bolt releasfingslide in eaoh of diiere'nt elevatedpositions "to which'said slide is raised by'fsdccessive upward movements, a second slideforreleasingsaid slide 'retaining member to permitv the bolt-controlling l slide to `droploackr to its starting position, a series f of' manually movable, operating membersand 'slideactuatingvv elements connected to said op- 'eratingmembers4 and cooperatingr Withportions y f'th'boltcontrolling slide to a boltfreleasing' or etracting position `inresponse tofsucce'ss'ive op- 'ing embers' in other than" said@ predetermined 'sei eneto thereby'c'ause the frSaid slidiretaiinfling niemeer; toi-be shifted; out Qf1supportingenfgagement 'with "the boit @ont rung-slide.

a. erede ns ai the slides whicheoperatejfwitnftheslide L aetuanngfeienfents '('off's'aid'slides'to (a) effect a step-.by-stepY raising veration dfi certain offsaidoperating members `in the second fs'lide'i' aiserievs'f "operating members andslide etatingmembers connected to said op'eratingf'membersfandeoop- 5 eratinwithportions lof `the bolt' eor'itiollinslide lboit mentioning sneer-adeptes and-support "the ifboltreleas- 1trol-litigislide to valo'oltl releasing' or retra'cting'po- `sitio'riV i responseAE -to-v successiyef voperation fof the A`@perating inembersin a predetermined sequence and 'fineans` whereby? the' second Slideis raisedito sii-ift the sud'e retainin'g'lfmmberf out'of'rsupportin :engagement wim-the `bo1tifcontrouingislide in iesponse toop'eration of'lsaidneratinggm'em- 1 here in other than 'saidpredtermined sequence.

JOHN J. vDRY. A

REFERENGESCH'ED following' references are ofrecord'irfthe i eie yof this pra-rem: 

